/*
* INSANE - Interactive Structural Analysis Environment
*
* Copyright (C) 2003-2005
* Universidade Federal de Minas Gerais
* Escola de Engenharia
* Departamento de Engenharia de Estruturas
* 
* Author's email :    insane@dees.ufmg.br
* Author's website :  http://www.dees.ufmg.br/insane
* 
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
* 
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* 
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
package br.ufmg.dees.insane.shape;

import br.ufmg.dees.insane.util.IMatrix;


/**
*A class representing a shape function for the RMCIQ4 element.
*
*@author Samir
*@version 1.0
*@since 06/11/06
*/

public class RMCIQ4 extends Q4 {
	private static final long serialVersionUID = 1L;

    /* (non-Javadoc)
     * @see br.ufmg.dees.insane.shape.Shape2D#getType()
     */
    public String getType() {
        return "RMCIQ4";
    }
    
    public IMatrix getAPT(double[] g, IMatrix cN){
		IMatrix APT = new IMatrix(2,8);
		APT.setZero();
		
    	double e = g[0];
		double n = g[1];
		
		APT.setElement(0,0,(1-n));
		APT.setElement(0,4,(1+n));
		APT.setElement(1,3,(1+e));
		APT.setElement(1,7,(1-e));
		
		APT.scale(0.5);
		
		return APT;
    }
    
    public IMatrix samplingPoints(){
    	IMatrix sp = new IMatrix(4,2);
    	sp.setZero();
    	
    	sp.setElement(0,1,-1);
    	sp.setElement(1,0,1);
    	sp.setElement(2,1,1);
    	sp.setElement(3,0,-1);
    	
    	return sp;
    }

}

